Implemented cross-distro compatible locking in slave scripts
Created by: zlamalp
- Base package will install also /usr/lib/tmpfiles.d/perun.conf which defines new folder /var/lock/perun/, which is generally writable for all users. This solve case, when slave script was running under normal user and didn't have privileges to create lock in /var/lock/ on CentOS host.
- Locking directory changed to /var/lock/perun/